Decorticating device for timber



J l, 1935. A. BEZNER I DECQRTICATING DEVICE FOR TIMBER 2 Sfieets-Sheet 1Filed Nov. 26, 1932 Jan. 1, 1935. 4 A. BEZNER ,70

DECORTICATING DEVICE FOR TIMBER Filed Nov 26, 19:52 2 Sheets-Sheet 2 Jnventor Patented 1, 1 935 I 1 1,986,707 DECORTICATlNG DEVICE FOR TIMBERAlbert Bezner, Ravensburg, Germany Application November 26, 1932, SerialNo. 644,535 In Germany November 23, 1929 "UNITED STATES PATENT- OFFICE 5Claims. (01. 144-298) This invention relates to a device for shaving thebody member 17 firmly positioned on the and trimming logs, timber, treetrunks, masts, and shaft 20 guided in the two bearings 19 and driven,the like, and particularly to decorticating or rossfor example, by thepulley 21. and of the sheet 1 ing machines of the type described in mycometal band 18 helicallyattached to the member a pending applicationSer. No. 497,549, filed Novem- 17. In Fig. 6, two steel bands 18 arewound in 5 her 22.1930, now Patent #1,921,904 issued August doublethread on the body 17, but it is also pos- 8, 1933,"and of which thisapplication is in part sible to provide one or several steel bands inone a continuation and in which. the timber to be or multiple threads.The circumference of the decorticated is turned during the barkingprocess body member 17 is correspondingly shaped to reby means ofrotatable tappet wheels and, byplacceive and secure the helical steelbands 18 and 10 ing the tappet wheels in an angular position, providedwith fastening surfaces therefor, the simultaneously moved forwardrelative to the bands 18 being preferably exchangeably secured barkingtool, so that the timber can be shaved by to the body by means ofscrews. At its outer being turned only once. I 1 border the steel band18 is made into a cutting According to the invention, the tappet wheelsedge. The band 18 helically wound around the 15 on which the'timber tobe, shaved is positioned body member 1'7 may be made also from sheetaredisposed on their shafts so that they maybe iron having a cuttingedge of high-grade steel swung about their axes and thus adjusted tothewelded to it. As shown particularly in Fig. 6,

. varying diameters of the timber to be treated. the helical cutter isdisposed at an angleof less -20 For this purpose, the tappet wheel axlesare prothan 90 relative to the longitudinal axis, of the 20 vided withspherical bearing units on which the body member. tappet wheelsconsisting of one or several parts The cutter shaft 201s carried by thelight metal and being hollow and spherical inside are guided casing 22which can be rotated, but not longioscillatorily and controlled by anadjusting memtudinally displaced, on the swingable arm steel 25 her.Therefore, the tappzt wheels can carry out tube 23. To the casing 22 orthe tube 23, on 25 any swinging motion relativeto the shaftwhile eitherside of the cutting roll, individually adthe positionof the latterremains unaltered. justable and exchangeable feelers or guards 24 By wayof example, one embodiment of the inare'attached, as shown in Fig. 6,which extend vention is illustrated in the accompanying drawunder thecasing 22 'and engage the surface of the '80 ings, in which Figure 1 isa side view of a decortimast or log to regulate the cutting action ofthe eating machine according to the invention; Fig. 2, cutter roll andits penetration into the log or a a top viewth'ereof; Fig. 3, a frontview of the timber 1.

tappet wheel frame, partly broken away; Figs. 4' Shavings areconveniently drawn off through and 5 are, respectively, a cross andlongitudinal the casing 22 and the swingable arm steel tube section ofone of the tappet wheels; and Fig. 6 is 23. In the double swingable armarrangement 85 a longitudinal section of the decorticating tool shown,the two swingable arm tubes 23 are conhaving the formof a helicalcutter. V nected by a curved or U-shaped terminal mem- Referring to thedrawings, the mast, log, or timber 27 (Figs. 1 and 2) with a jointsuction disher 1 to be shaved rests on the two driven tappet charge 28.

49 wheels 2 which are mounted swivelably and turn The tappet wheel frameor bracket 31 is also 40 the log or mast 1 during the barking processand provided with a suction discharging device 30 move it forward inaxial direction when turned for shavings and the like, the bracket 31having around their axes in the same way out of a vertifor this purposebelow the wheels 2 a hollow cal plane. The mast or log 1 is worked bythe space 29, as shown in Figs. 1 and 3, of a form helical cutter 4rotatably disposed on the free end causing the dropping shavings or thelike to 45 of the tubular swingable arms 22, 23 and driven, accumulateat one point whence they can be for instance, by the belt 3. In Fig. 2,two tubular drawn off by t P pe or tube 30. 7 arms 22, 23 are shownwhich are pivotally sus- The tappet wheels 2 are oscillatorily orswivelpended from the frame 33 so as to swing about ably disposed ontheir shafts of rotation 6 to the shaft 5 which extends parallel to thelongiimpart to the-timber to be treated forward mo- 50 tudinal' axis ofthe mast 1,- each of the two arms tion in longitudinal direction inaddition to rocarrying atits free end ahelical cutter 4. Swingtarymotion. For this purpose there are, for ing supporting structures havingonearm or more example, spherical units '1 keyed on to the shafts thantwo may be employed also. i 6 which may be driven by a sprocket 32 or inany 5 2 As Fig. 6 shows, the helical cutter 4 consists of other suitablemanner, as indicated in Figs. 3

the grooves 10 of the 2 can be which can be rotated in the purposeadjustable by a as indicated in Figs. 1 ing common spindle I claimz- 1.Feed mechanism common hand wheel 25, and 2, and correspondsaid wheel.

2. Feed mechanism i'ordebarking machines comprising a pair of wheelsadapted to impart rotary motion and'i'orward motion in a longitudinaldirection to the timber being debarked,

said wheel consisting of two interconnected parts and a one-piecedentated rim surrounding said parts, a spherical bearing member on eachshaft provided with a peripheral groove, a sliding member in each ofsaid grooves joined to a corresponding one of said wheels for orientablyJournaling each said wheel on a corresponding said spherical bearingmember, and a U-shaped adlusting member for each wheel through which thelateral sides of said rim slide, said adjusting member being adapted andmounted to orient said wheel about an axis perpendicularito the axis ofsaid wheeL' 3. Feed mechanism comprising a pair of for debarkingmachines wheels adapted to impart rotary motion and forward motion in alongitudinal direction to the timber being debarked, a

memo? .Smnding one of naling each said. spherical bearing X11182 to theaxle of and transmission members.

said wheels for orientably Joursupporting shaft for each lwheel disposedparto'ithe longitudinal wheel a'corresponding said member; ,a U-shapedadiustsaid wheel. u Feedmechanism for ,debarking machines comprising apair of wheels adapted to impart rotary motion and forward motion in alongitudi- -nal direction to the timber being debarked, a

on a corresponding her, a U -shaped adjusting member for each wheel andthrough which the outer edgerof said wheel moves, a pin carrying eachsaid adjusting memsponding said wheel.

- ALBERT BEZNER.

